How
How. a. A sequence of choices commonly called learning; choices occur through trial-and-error until a problem is solved.
b. A means or process, as in "Use the option others use to solve this problem."
c. A measure or quantity, as in the number, amount, or proportion of time or trials-and-errors it takes to make choices that answer these questions, "What is it?" "What is it not?" "What is like it?" "What comes next?" and...
